Last Thursday, Mozilla, the company that’s home to the web browser Firefox, forced the resignation of CEO Brendan Eich. What, precisely, had Eich done wrong? Back in 2008, Eich had donated $1,000 to the Proposition 8 effort backing traditional marriage in California. Dating website OKCupid posted a ban on Firefox traffic, issuing a message to Firefox users instead: “Those who seek to deny love and instead enforce misery, shame, and frustration are our enemies, and we wish them nothing but failure.” That ban reportedly prompted the action at Mozilla. Of course, it was the people pushing for Eich’s ouster who...